BS EN 12952-15:2003 - Page 3

This European Standard covers direct-fired steam boilers and hot water generators, including the auxiliaries. For the purposes of this standard, steam boilers and hot water generators are vessels and pipework systems in which:

• steam at a pressure higher than atmospheric pressure is generated for use external to the system;
• water is heated to a temperature higher than the saturation temperature at atmospheric pressure for use external to the system.

This standard is intended as the basis for the thermal performance (acceptance) testing of direct-fired steam boilers and hot water generators. Such tests are designed to demonstrate that the guarantees with respect to efficiency and output or other parameters have been met.

This standard includes (among other things):

• recommendations for the performance of acceptance tests (see clause 6);
• a definition of the envelope boundary of the steam generating unit and of the efficiency (see clause 8);
• details on the uncertainty of measurement.